APA
Proakis J. G., Manolakis D. G., . (1989). Introduction to digital signal processing. New York: Macmillan Publishing Co.
Chicago
Proakis J G, Manolakis D G, . 1989. Introduction to digital signal processing. New York: Macmillan Publishing Co.
Harvard
Proakis J. G., Manolakis D. G., . (1989). Introduction to digital signal processing. New York: Macmillan Publishing Co.
MLA
Proakis J G, Manolakis D G, . Introduction to digital signal processing. New York: Macmillan Publishing Co. 1989.